31.Find the area of quadrilateral PQRS shown in the figure:
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32.Find the area of a rhombus whose diagonals are of lengths 10 cm and 8.2 cm.
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33.Find the area of the polygon ABCDE as shown in the figure.
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34.The area of a trapezium shaped field is 480 m2, the distance between two parallel sides is 15 m and one of the parallel side is 20 m. Find the other parallel side.
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35.The area of the rhombus is 240 cm2 and one of the diagonals is 16 cm. Find the other diagonal.
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36.Find the area of the regular hexagon MNOPQR of side 5 cm.
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37.Why is it incorrect to call the solid shown here a cylinder?
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38.Find the total surface area of the following cuboids:
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39.Can we say that the total surface area of cuboid = lateral surface area + 2 × area of base?
40.Find the surface area of cube A and lateral surface area of cube B.
For cube A: Side (I) = 10 cm ∴ Total surface area of the cube = 612 = 6 x (10)2 cm2 = 600 cm2 For cube B: Side (I) = 8 cm ∴ Total surface area of the cube = 612 = 6 x (8)2 cm2 = 6 x 64 cm2 = 256 cm2
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